Turion X2 TL50 (1,6Ghz)
The governor is irrelevant, because you can't change the voltage of the lowest fid on that cpu (it is already at the lowest setting, 800mV).
The highest fid (there are only two for that cpu) is normally 1100mV, which gives me up to 90°C at full cpu usage.
(I will clean the fans and renew the thermal paste soon, that should drop the temperature a bit.)
I have been able to stable (not "QMC-stable", but "Spinhedge-stable") undervolt it at 925mV, which is also what I've set now and that gives me about 70-75°C at full cpu usage.
It shows, that it sets that:

the phc *intel* module works fine on my old intel processor ..._________________.... there is nothing - absolutely nothing - half so much worth
doing as simply messing about with Linux ...
(apologies to Kenneth Graeme)